mirror of https://github.com/knative/client.git
87 lines
3.0 KiB
Markdown
87 lines
3.0 KiB
Markdown
# Management Commands
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- [Service Management](#Service-Management)
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- [Revision Management](#Revision-Management)
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- [Utilities](#Utilities)
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- [Common Flags](#Common-Flags)
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## Service Management
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A Knative service is the embodiment of a serverless workload. It is generally in
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the form of a collection of containers running in a group of pods, in the
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underlying Kubernetes cluster. Each Knative service associates with a collection
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of revisions, which represent the evolution of that service.
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With the Kn CLI a user can [`list`](../cmd/kn_service_list.md),
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[`create`](../cmd/kn_service_create.md),
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[`delete`](../cmd/kn_service_delete.md), and
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[`update`](../cmd/kn_service_update.md) Knative services. The
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[detail reference](../cmd/kn_service.md) of each sub-command under the
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[`service`](../cmd/kn_service.md) command shows the options and flags for this
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group of commands.
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Examples:
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```bash
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# Create a new service from an image
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kn service create mysvc --env KEY1=VALUE1 --env KEY2=VALUE2 --image knativesamples/helloworld
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```
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You are able to also specify the requests and limits of both CPU and memory when
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creating a service. See [`service create`](../cmd/kn_service_create.md) command
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reference for additional details.
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```bash
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# List existing services in the 'default' namespace of your cluster
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kn service list
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```
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You can also list services from all namespaces or a specific namespace using
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flags: `--all-namespaces` and `--namespace mynamespace`. See
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[`service list`](../cmd/kn_service_list.md) command reference for additional
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details.
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## Revision Management
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A Knative revision is a "snapshot" of the specification of a service. For
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instance, when a Knative service is created with the environment variable
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`FOO=bar` a revision is added to the service. Afterwards, when the environment
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variable is changed to `baz` or additional variables are added, a new revision
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is created. When the image that the service is running is changed to a new
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digest, a new revision is created.
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With the [`revision`](../cmd/kn_revision.md) command group you can
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[list](../cmd/kn_revision_list.md) and
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[describe](../cmd/kn_revision_describe.md) the current revisions on a service.
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Examples:
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```bash
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# Listing a service's revision
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kn revision list --service srvc
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```
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## Utilities
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These are commands that provide some useful information to the user.
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- The `kn help` command displays a list of the commands with helpful
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information.
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- The [`kn version`](../cmd/kn_version.md) command will display the current
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version of the `kn` build including date and Git commit revision.
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- The `kn completion` command will output a BASH completion script for `kn` to
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allow command completions with tabs.
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## Common Flags
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For every `kn` command, you can use these common additional flags:
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- `-h` or `--help` to display specific help for that command
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- `--config string` which specifies the `kn` config file (default is
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\$HOME/.kn.yaml)
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- `--kubeconfig string` which specifies the kubectl config file (default is
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\$HOME/.kube/config)
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